Hi from sunny UK.

I have just fitted one of the above into my Fylde Falstaff (was amazed just how easy it was to fit) but I have a couple of issues - firstly, the endpin jack seems to be made in two halves that screw together, should these be screwed tight together or left loose as it is at present? Second, I now have a slight buzz from my d string (only the d string) I don't think it is fret buzz, could it be a wire inside not secured properly or could it be related to the endpin jack/pre-amp not being screwed tight together?